写代码，stm32f103c8t6的tim1输出pwm

好的，以下是配合STM32CubeMX和HAL库的代码示例：

1. 打开STM32CubeMX，选择你的芯片型号，然后打开Pinout选项卡，将TIM1_CH1的引脚设置为GPIO输出。

2. 打开Configuration选项卡，找到TIM1配置选项，将Mode设置为PWM Generation CH1，然后设置Prescaler和Period参数（这决定了PWM的频率和分辨率，根据需求设置）。

3. 在代码中初始化TIM1和对应的GPIO引脚，然后设置PWM占空比即可。以下是示例代码：

#include "main.h"
#include "stm32f1xx_hal.h"

TIM_HandleTypeDef htim1;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM1_Init(void);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_TIM1_Init();

  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);

  while (1)
  {
    __HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, 50); //设置PWM占空比，这里是50%
    HAL_Delay(1000);
    __HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, 80);
    HAL_Delay(1000);
  }
}

void MX_TIM1_Init(void)
{
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};

  htim1.Instance = TIM1;
  htim1.Init.Prescaler = 719; //设置预分频器
  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim1.Init.Period = 999; //设置计数器周期
  htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim1.Init.RepetitionCounter = 0;
  if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 500; //设置初始占空比，这里是50%
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
}

void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  __HAL_RCC_GPIOA_CLK_ENABLE();

  GPIO_InitStruct.Pin = GPIO_PIN_8;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void Error_Handler(void)
{
  //错误处理函数
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK |
                                RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

以上代码可以实现每隔1秒钟将PWM占空比从50%变为80%，然后再变回50%。你可以根据实际需求修改代码中的参数。